If your fan has stopped working, theres a good chance that the resistor has gone bad and burned the plug that connects to the fan motor as well as the plug on the body side harness that connect to the resistor itself. Replace the burned harness connector with a new genuine Ford pigtail unit. Be sure to check the resistor as it can be burned as well (a faulty resistor is most likely to blame for this anyways). Replacement resistor p/n FMC-BR3Z-8L603-A is available from Lethal Performance as well to complete the job.